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Non-Transient Non-Community Water System · PWS IL3037291

Indian Knoll School Dist 33

West Chicago, Illinois 60185 - drinking water served from groundwater sources to 600 people, tracked in EPA SDWIS and UCMR5.

600
People served
292
EPA violations
2
Health-based
Untested
UCMR5 result

The verdict

EPA records 292 drinking-water violations at Indian Knoll School Dist 33, 1% of them health-based - above the Illinois per-system average.

292
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
600
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Indian Knoll School Dist 33

Indian Knoll School Dist 33 is a public/private-owned non-transient non-community water system that delivers drinking water to 600 residents in West Chicago, Illinois (DuPage County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 292 total violations for this system , of which 2 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 280 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 9 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Illinois, EPA tracks 5,117 public water systems serving 12,576,876 people, with 355,322 cumulative violations and 52,932 health-based violations on record. About 81% of systems in the state carry at least one violation, and state-wide the average per system is 69.4 violations. Statewide, 199 of 487 UCMR5-tested systems have reported PFAS detections (40.9%).

Indian Knoll School Dist 33's 292 violations sit above the Illinois average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
600
Total Violations
292
Health-Based Violations
2
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Public/Private
Connections
1
County
DuPage
School/Daycare
Yes
MCL Violations
0
Monitoring Violations
280
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 9 2021
OXAMYL MR 8 2020
Carbofuran MR 8 2020
Public Notice Other 8 2024
1,2-Dichloroethane MR 6 2018
trans-1,2-Dichloroethylene MR 6 2018
1,1,1-Trichloroethane MR 6 2018
Trichloroethylene MR 6 2018
1,1,2-Trichloroethane MR 6 2018
Tetrachloroethylene MR 6 2018
CHLOROBENZENE MR 6 2018
Benzene MR 6 2018
Toluene MR 6 2018
1,2,4-Trichlorobenzene MR 6 2018
Styrene MR 6 2018
Xylenes, Total MR 6 2018
o-Dichlorobenzene MR 6 2018
Carbon tetrachloride MR 6 2018
Ethylbenzene MR 6 2018
Total Haloacetic Acids (HAA5) MR 6 2022
1,2-Dichloropropane MR 6 2018
Chlorine MR 6 2023
cis-1,2-Dichloroethylene MR 6 2018
DICHLOROMETHANE MR 6 2018
1,1-Dichloroethylene MR 6 2018
Vinyl chloride MR 6 2018
p-Dichlorobenzene MR 6 2018
Methoxychlor MR 4 2017
Endothall MR 4 2017
Simazine MR 4 2017

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Indian Knoll School Dist 33.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID IL3037291 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Illinois Drinking Water Authority

Illinois EPA, Bureau of Water is the primacy agency that licenses and inspects Indian Knoll School Dist 33 under EPA-delegated authority.

Open IL regulator portal

Source: Illinois EPA, Bureau of Water

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2024 Public Notice Other 8 SDWIS / IL3037291 / 7500
2024 LEAD AND COPPER RULE REVISIONS RPT 2 SDWIS / IL3037291 / 5200
2024 LEAD AND COPPER RULE REVISIONS TT 2 SDWIS / IL3037291 / 5200
2023 Chlorine MR 6 SDWIS / IL3037291 / 0999
2022 Total Haloacetic Acids (HAA5) MR 6 SDWIS / IL3037291 / 2456
2021 Lead and Copper Rule MR 9 SDWIS / IL3037291 / 5000
2020 OXAMYL MR 8 SDWIS / IL3037291 / 2036
2020 Carbofuran MR 8 SDWIS / IL3037291 / 2046
2020 Barium MR 4 SDWIS / IL3037291 / 1010
2020 Cadmium MR 4 SDWIS / IL3037291 / 1015
2020 Chromium MR 4 SDWIS / IL3037291 / 1020
2020 CYANIDE MR 4 SDWIS / IL3037291 / 1024
2020 Antimony, Total MR 4 SDWIS / IL3037291 / 1074
2020 Beryllium, Total MR 4 SDWIS / IL3037291 / 1075
2020 Thallium, Total MR 4 SDWIS / IL3037291 / 1085

How Indian Knoll School Dist 33 Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Indian Knoll School Dist 33 Illinois avg Federal benchmark
Total violations 292 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 2 10.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 40.9% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 600 2,458 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 5,117 regulated public water systems in Illinois.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Indian Knoll School Dist 33 water safe to drink? ▼
Indian Knoll School Dist 33 (PWS ID: IL3037291) has 292 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 600 people using Groundwater sources.
How many people does Indian Knoll School Dist 33 serve? ▼
Indian Knoll School Dist 33 serves 600 people in West Chicago, Illinois. It is a Public/Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does Indian Knoll School Dist 33 have? ▼
Indian Knoll School Dist 33 has 292 total violations: 2 health-based violations (MCL exceedances or treatment failures), 280 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Indian Knoll School Dist 33 water? ▼
No PFAS testing data is available for Indian Knoll School Dist 33 under the EPA's UCMR5 monitoring program.
What water source does Indian Knoll School Dist 33 use? ▼
Indian Knoll School Dist 33 uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.